1 /* 2 * Copyright (c) 2018-2019, STMicroelectronics - All Rights Reserved 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <errno.h> 9 #include <string.h> 10 11 #include <libfdt.h> 12 13 #include <platform_def.h> 14 15 #include <arch.h> 16 #include <arch_helpers.h> 17 #include <common/debug.h> 18 #include <drivers/delay_timer.h> 19 #include <drivers/mmc.h> 20 #include <drivers/st/stm32_sdmmc2.h> 21 #include <drivers/st/stm32mp1_clk.h> 22 #include <drivers/st/stm32mp1_rcc.h> 23 #include <drivers/st/stm32mp1_reset.h> 24 #include <dt-bindings/clock/stm32mp1-clks.h> 25 #include <dt-bindings/reset/stm32mp1-resets.h> 26 #include <lib/mmio.h> 27 #include <lib/utils.h> 28 #include <plat/common/platform.h> 29 30 /* Registers offsets */ 31 #define SDMMC_POWER 0x00U 32 #define SDMMC_CLKCR 0x04U 33 #define SDMMC_ARGR 0x08U 34 #define SDMMC_CMDR 0x0CU 35 #define SDMMC_RESPCMDR 0x10U 36 #define SDMMC_RESP1R 0x14U 37 #define SDMMC_RESP2R 0x18U 38 #define SDMMC_RESP3R 0x1CU 39 #define SDMMC_RESP4R 0x20U 40 #define SDMMC_DTIMER 0x24U 41 #define SDMMC_DLENR 0x28U 42 #define SDMMC_DCTRLR 0x2CU 43 #define SDMMC_DCNTR 0x30U 44 #define SDMMC_STAR 0x34U 45 #define SDMMC_ICR 0x38U 46 #define SDMMC_MASKR 0x3CU 47 #define SDMMC_ACKTIMER 0x40U 48 #define SDMMC_IDMACTRLR 0x50U 49 #define SDMMC_IDMABSIZER 0x54U 50 #define SDMMC_IDMABASE0R 0x58U 51 #define SDMMC_IDMABASE1R 0x5CU 52 #define SDMMC_FIFOR 0x80U 53 54 /* SDMMC power control register */ 55 #define SDMMC_POWER_PWRCTRL GENMASK(1, 0) 56 #define SDMMC_POWER_DIRPOL BIT(4) 57 58 /* SDMMC clock control register */ 59 #define SDMMC_CLKCR_WIDBUS_4 BIT(14) 60 #define SDMMC_CLKCR_WIDBUS_8 BIT(15) 61 #define SDMMC_CLKCR_NEGEDGE BIT(16) 62 #define SDMMC_CLKCR_HWFC_EN BIT(17) 63 #define SDMMC_CLKCR_SELCLKRX_0 BIT(20) 64 65 /* SDMMC command register */ 66 #define SDMMC_CMDR_CMDTRANS BIT(6) 67 #define SDMMC_CMDR_CMDSTOP BIT(7) 68 #define SDMMC_CMDR_WAITRESP GENMASK(9, 8) 69 #define SDMMC_CMDR_WAITRESP_SHORT BIT(8) 70 #define SDMMC_CMDR_WAITRESP_SHORT_NOCRC BIT(9) 71 #define SDMMC_CMDR_CPSMEN BIT(12) 72 73 /* SDMMC data control register */ 74 #define SDMMC_DCTRLR_DTEN BIT(0) 75 #define SDMMC_DCTRLR_DTDIR BIT(1) 76 #define SDMMC_DCTRLR_DTMODE GENMASK(3, 2) 77 #define SDMMC_DCTRLR_DBLOCKSIZE_0 BIT(4) 78 #define SDMMC_DCTRLR_DBLOCKSIZE_1 BIT(5) 79 #define SDMMC_DCTRLR_DBLOCKSIZE_3 BIT(7) 80 #define SDMMC_DCTRLR_DBLOCKSIZE GENMASK(7, 4) 81 #define SDMMC_DCTRLR_FIFORST BIT(13) 82 83 #define SDMMC_DCTRLR_CLEAR_MASK (SDMMC_DCTRLR_DTEN | \ 84 SDMMC_DCTRLR_DTDIR | \ 85 SDMMC_DCTRLR_DTMODE | \ 86 SDMMC_DCTRLR_DBLOCKSIZE) 87 #define SDMMC_DBLOCKSIZE_8 (SDMMC_DCTRLR_DBLOCKSIZE_0 | \ 88 SDMMC_DCTRLR_DBLOCKSIZE_1) 89 #define SDMMC_DBLOCKSIZE_512 (SDMMC_DCTRLR_DBLOCKSIZE_0 | \ 90 SDMMC_DCTRLR_DBLOCKSIZE_3) 91 92 /* SDMMC status register */ 93 #define SDMMC_STAR_CCRCFAIL BIT(0) 94 #define SDMMC_STAR_DCRCFAIL BIT(1) 95 #define SDMMC_STAR_CTIMEOUT BIT(2) 96 #define SDMMC_STAR_DTIMEOUT BIT(3) 97 #define SDMMC_STAR_TXUNDERR BIT(4) 98 #define SDMMC_STAR_RXOVERR BIT(5) 99 #define SDMMC_STAR_CMDREND BIT(6) 100 #define SDMMC_STAR_CMDSENT BIT(7) 101 #define SDMMC_STAR_DATAEND BIT(8) 102 #define SDMMC_STAR_DBCKEND BIT(10) 103 #define SDMMC_STAR_DPSMACT BIT(12) 104 #define SDMMC_STAR_RXFIFOHF BIT(15) 105 #define SDMMC_STAR_RXFIFOE BIT(19) 106 #define SDMMC_STAR_IDMATE BIT(27) 107 #define SDMMC_STAR_IDMABTC BIT(28) 108 109 /* SDMMC DMA control register */ 110 #define SDMMC_IDMACTRLR_IDMAEN BIT(0) 111 112 #define SDMMC_STATIC_FLAGS (SDMMC_STAR_CCRCFAIL | \ 113 SDMMC_STAR_DCRCFAIL | \ 114 SDMMC_STAR_CTIMEOUT | \ 115 SDMMC_STAR_DTIMEOUT | \ 116 SDMMC_STAR_TXUNDERR | \ 117 SDMMC_STAR_RXOVERR | \ 118 SDMMC_STAR_CMDREND | \ 119 SDMMC_STAR_CMDSENT | \ 120 SDMMC_STAR_DATAEND | \ 121 SDMMC_STAR_DBCKEND | \ 122 SDMMC_STAR_IDMATE | \ 123 SDMMC_STAR_IDMABTC) 124 125 #define TIMEOUT_10_MS (plat_get_syscnt_freq2() / 100U) 126 #define TIMEOUT_1_S plat_get_syscnt_freq2() 127 128 #define DT_SDMMC2_COMPAT "st,stm32-sdmmc2" 129 130 static void stm32_sdmmc2_init(void); 131 static int stm32_sdmmc2_send_cmd_req(struct mmc_cmd *cmd); 132 static int stm32_sdmmc2_send_cmd(struct mmc_cmd *cmd); 133 static int stm32_sdmmc2_set_ios(unsigned int clk, unsigned int width); 134 static int stm32_sdmmc2_prepare(int lba, uintptr_t buf, size_t size); 135 static int stm32_sdmmc2_read(int lba, uintptr_t buf, size_t size); 136 static int stm32_sdmmc2_write(int lba, uintptr_t buf, size_t size); 137 138 static const struct mmc_ops stm32_sdmmc2_ops = { 139 .init = stm32_sdmmc2_init, 140 .send_cmd = stm32_sdmmc2_send_cmd, 141 .set_ios = stm32_sdmmc2_set_ios, 142 .prepare = stm32_sdmmc2_prepare, 143 .read = stm32_sdmmc2_read, 144 .write = stm32_sdmmc2_write, 145 }; 146 147 static struct stm32_sdmmc2_params sdmmc2_params; 148 149 #pragma weak plat_sdmmc2_use_dma 150 bool plat_sdmmc2_use_dma(unsigned int instance, unsigned int memory) 151 { 152 return false; 153 } 154 155 static void stm32_sdmmc2_init(void) 156 { 157 uint32_t clock_div; 158 uintptr_t base = sdmmc2_params.reg_base; 159 160 clock_div = div_round_up(sdmmc2_params.clk_rate, 161 STM32MP1_MMC_INIT_FREQ * 2); 162 163 mmio_write_32(base + SDMMC_CLKCR, SDMMC_CLKCR_HWFC_EN | clock_div | 164 sdmmc2_params.negedge | 165 sdmmc2_params.pin_ckin); 166 167 mmio_write_32(base + SDMMC_POWER, 168 SDMMC_POWER_PWRCTRL | sdmmc2_params.dirpol); 169 170 mdelay(1); 171 } 172 173 static int stm32_sdmmc2_stop_transfer(void) 174 { 175 struct mmc_cmd cmd_stop; 176 177 zeromem(&cmd_stop, sizeof(struct mmc_cmd)); 178 179 cmd_stop.cmd_idx = MMC_CMD(12); 180 cmd_stop.resp_type = MMC_RESPONSE_R1B; 181 182 return stm32_sdmmc2_send_cmd(&cmd_stop); 183 } 184 185 static int stm32_sdmmc2_send_cmd_req(struct mmc_cmd *cmd) 186 { 187 uint32_t flags_cmd, status; 188 uint32_t flags_data = 0; 189 int err = 0; 190 uintptr_t base = sdmmc2_params.reg_base; 191 unsigned int cmd_reg, arg_reg, start; 192 193 if (cmd == NULL) { 194 return -EINVAL; 195 } 196 197 flags_cmd = SDMMC_STAR_CTIMEOUT; 198 arg_reg = cmd->cmd_arg; 199 200 if ((mmio_read_32(base + SDMMC_CMDR) & SDMMC_CMDR_CPSMEN) != 0U) { 201 mmio_write_32(base + SDMMC_CMDR, 0); 202 } 203 204 cmd_reg = cmd->cmd_idx | SDMMC_CMDR_CPSMEN; 205 206 if (cmd->resp_type == 0U) { 207 flags_cmd |= SDMMC_STAR_CMDSENT; 208 } 209 210 if ((cmd->resp_type & MMC_RSP_48) != 0U) { 211 if ((cmd->resp_type & MMC_RSP_136) != 0U) { 212 flags_cmd |= SDMMC_STAR_CMDREND; 213 cmd_reg |= SDMMC_CMDR_WAITRESP; 214 } else if ((cmd->resp_type & MMC_RSP_CRC) != 0U) { 215 flags_cmd |= SDMMC_STAR_CMDREND | SDMMC_STAR_CCRCFAIL; 216 cmd_reg |= SDMMC_CMDR_WAITRESP_SHORT; 217 } else { 218 flags_cmd |= SDMMC_STAR_CMDREND; 219 cmd_reg |= SDMMC_CMDR_WAITRESP_SHORT_NOCRC; 220 } 221 } 222 223 switch (cmd->cmd_idx) { 224 case MMC_CMD(1): 225 arg_reg |= OCR_POWERUP; 226 break; 227 case MMC_CMD(8): 228 if (sdmmc2_params.device_info->mmc_dev_type == MMC_IS_EMMC) { 229 cmd_reg |= SDMMC_CMDR_CMDTRANS; 230 } 231 break; 232 case MMC_CMD(12): 233 cmd_reg |= SDMMC_CMDR_CMDSTOP; 234 break; 235 case MMC_CMD(17): 236 case MMC_CMD(18): 237 cmd_reg |= SDMMC_CMDR_CMDTRANS; 238 if (sdmmc2_params.use_dma) { 239 flags_data |= SDMMC_STAR_DCRCFAIL | 240 SDMMC_STAR_DTIMEOUT | 241 SDMMC_STAR_DATAEND | 242 SDMMC_STAR_RXOVERR | 243 SDMMC_STAR_IDMATE; 244 } 245 break; 246 case MMC_ACMD(41): 247 arg_reg |= OCR_3_2_3_3 | OCR_3_3_3_4; 248 break; 249 case MMC_ACMD(51): 250 cmd_reg |= SDMMC_CMDR_CMDTRANS; 251 if (sdmmc2_params.use_dma) { 252 flags_data |= SDMMC_STAR_DCRCFAIL | 253 SDMMC_STAR_DTIMEOUT | 254 SDMMC_STAR_DATAEND | 255 SDMMC_STAR_RXOVERR | 256 SDMMC_STAR_IDMATE | 257 SDMMC_STAR_DBCKEND; 258 } 259 break; 260 default: 261 break; 262 } 263 264 if ((cmd->resp_type & MMC_RSP_BUSY) != 0U) { 265 mmio_write_32(base + SDMMC_DTIMER, UINT32_MAX); 266 } 267 268 mmio_write_32(base + SDMMC_ARGR, arg_reg); 269 270 mmio_write_32(base + SDMMC_CMDR, cmd_reg); 271 272 status = mmio_read_32(base + SDMMC_STAR); 273 274 start = get_timer(0); 275 276 while ((status & flags_cmd) == 0U) { 277 if (get_timer(start) > TIMEOUT_10_MS) { 278 err = -ETIMEDOUT; 279 ERROR("%s: timeout 10ms (cmd = %d,status = %x)\n", 280 __func__, cmd->cmd_idx, status); 281 goto err_exit; 282 } 283 284 status = mmio_read_32(base + SDMMC_STAR); 285 } 286 287 if ((status & (SDMMC_STAR_CTIMEOUT | SDMMC_STAR_CCRCFAIL)) != 0U) { 288 if ((status & SDMMC_STAR_CTIMEOUT) != 0U) { 289 err = -ETIMEDOUT; 290 /* 291 * Those timeouts can occur, and framework will handle 292 * the retries. CMD8 is expected to return this timeout 293 * for eMMC 294 */ 295 if (!((cmd->cmd_idx == MMC_CMD(1)) || 296 (cmd->cmd_idx == MMC_CMD(13)) || 297 ((cmd->cmd_idx == MMC_CMD(8)) && 298 (cmd->resp_type == MMC_RESPONSE_R7)))) { 299 ERROR("%s: CTIMEOUT (cmd = %d,status = %x)\n", 300 __func__, cmd->cmd_idx, status); 301 } 302 } else { 303 err = -EIO; 304 ERROR("%s: CRCFAIL (cmd = %d,status = %x)\n", 305 __func__, cmd->cmd_idx, status); 306 } 307 308 goto err_exit; 309 } 310 311 if ((cmd_reg & SDMMC_CMDR_WAITRESP) != 0U) { 312 if ((cmd->cmd_idx == MMC_CMD(9)) && 313 ((cmd_reg & SDMMC_CMDR_WAITRESP) == SDMMC_CMDR_WAITRESP)) { 314 /* Need to invert response to match CSD structure */ 315 cmd->resp_data[0] = mmio_read_32(base + SDMMC_RESP4R); 316 cmd->resp_data[1] = mmio_read_32(base + SDMMC_RESP3R); 317 cmd->resp_data[2] = mmio_read_32(base + SDMMC_RESP2R); 318 cmd->resp_data[3] = mmio_read_32(base + SDMMC_RESP1R); 319 } else { 320 cmd->resp_data[0] = mmio_read_32(base + SDMMC_RESP1R); 321 if ((cmd_reg & SDMMC_CMDR_WAITRESP) == 322 SDMMC_CMDR_WAITRESP) { 323 cmd->resp_data[1] = mmio_read_32(base + 324 SDMMC_RESP2R); 325 cmd->resp_data[2] = mmio_read_32(base + 326 SDMMC_RESP3R); 327 cmd->resp_data[3] = mmio_read_32(base + 328 SDMMC_RESP4R); 329 } 330 } 331 } 332 333 if (flags_data == 0U) { 334 mmio_write_32(base + SDMMC_ICR, SDMMC_STATIC_FLAGS); 335 336 return 0; 337 } 338 339 status = mmio_read_32(base + SDMMC_STAR); 340 341 start = get_timer(0); 342 343 while ((status & flags_data) == 0U) { 344 if (get_timer(start) > TIMEOUT_10_MS) { 345 ERROR("%s: timeout 10ms (cmd = %d,status = %x)\n", 346 __func__, cmd->cmd_idx, status); 347 err = -ETIMEDOUT; 348 goto err_exit; 349 } 350 351 status = mmio_read_32(base + SDMMC_STAR); 352 }; 353 354 if ((status & (SDMMC_STAR_DTIMEOUT | SDMMC_STAR_DCRCFAIL | 355 SDMMC_STAR_TXUNDERR | SDMMC_STAR_RXOVERR | 356 SDMMC_STAR_IDMATE)) != 0U) { 357 ERROR("%s: Error flag (cmd = %d,status = %x)\n", __func__, 358 cmd->cmd_idx, status); 359 err = -EIO; 360 } 361 362 err_exit: 363 mmio_write_32(base + SDMMC_ICR, SDMMC_STATIC_FLAGS); 364 mmio_clrbits_32(base + SDMMC_CMDR, SDMMC_CMDR_CMDTRANS); 365 366 if (err != 0) { 367 int ret_stop = stm32_sdmmc2_stop_transfer(); 368 369 if (ret_stop != 0) { 370 return ret_stop; 371 } 372 } 373 374 return err; 375 } 376 377 static int stm32_sdmmc2_send_cmd(struct mmc_cmd *cmd) 378 { 379 int8_t retry; 380 int err = 0; 381 382 assert(cmd != NULL); 383 384 for (retry = 0; retry <= 3; retry++) { 385 err = stm32_sdmmc2_send_cmd_req(cmd); 386 if (err == 0) { 387 return err; 388 } 389 390 if ((cmd->cmd_idx == MMC_CMD(1)) || 391 (cmd->cmd_idx == MMC_CMD(13))) { 392 return 0; /* Retry managed by framework */ 393 } 394 395 /* Command 8 is expected to fail for eMMC */ 396 if (!(cmd->cmd_idx == MMC_CMD(8))) { 397 WARN(" CMD%d, Retry: %d, Error: %d\n", 398 cmd->cmd_idx, retry, err); 399 } 400 401 udelay(10); 402 } 403 404 return err; 405 } 406 407 static int stm32_sdmmc2_set_ios(unsigned int clk, unsigned int width) 408 { 409 uintptr_t base = sdmmc2_params.reg_base; 410 uint32_t bus_cfg = 0; 411 uint32_t clock_div, max_freq; 412 uint32_t clk_rate = sdmmc2_params.clk_rate; 413 uint32_t max_bus_freq = sdmmc2_params.device_info->max_bus_freq; 414 415 switch (width) { 416 case MMC_BUS_WIDTH_1: 417 break; 418 case MMC_BUS_WIDTH_4: 419 bus_cfg |= SDMMC_CLKCR_WIDBUS_4; 420 break; 421 case MMC_BUS_WIDTH_8: 422 bus_cfg |= SDMMC_CLKCR_WIDBUS_8; 423 break; 424 default: 425 panic(); 426 break; 427 } 428 429 if (sdmmc2_params.device_info->mmc_dev_type == MMC_IS_EMMC) { 430 if (max_bus_freq >= 52000000U) { 431 max_freq = STM32MP1_EMMC_HIGH_SPEED_MAX_FREQ; 432 } else { 433 max_freq = STM32MP1_EMMC_NORMAL_SPEED_MAX_FREQ; 434 } 435 } else { 436 if (max_bus_freq >= 50000000U) { 437 max_freq = STM32MP1_SD_HIGH_SPEED_MAX_FREQ; 438 } else { 439 max_freq = STM32MP1_SD_NORMAL_SPEED_MAX_FREQ; 440 } 441 } 442 443 clock_div = div_round_up(clk_rate, max_freq * 2); 444 445 mmio_write_32(base + SDMMC_CLKCR, 446 SDMMC_CLKCR_HWFC_EN | clock_div | bus_cfg | 447 sdmmc2_params.negedge | 448 sdmmc2_params.pin_ckin); 449 450 return 0; 451 } 452 453 static int stm32_sdmmc2_prepare(int lba, uintptr_t buf, size_t size) 454 { 455 struct mmc_cmd cmd; 456 int ret; 457 uintptr_t base = sdmmc2_params.reg_base; 458 uint32_t data_ctrl = SDMMC_DCTRLR_DTDIR; 459 460 if (size == 8U) { 461 data_ctrl |= SDMMC_DBLOCKSIZE_8; 462 } else { 463 data_ctrl |= SDMMC_DBLOCKSIZE_512; 464 } 465 466 sdmmc2_params.use_dma = plat_sdmmc2_use_dma(base, buf); 467 468 if (sdmmc2_params.use_dma) { 469 inv_dcache_range(buf, size); 470 } 471 472 /* Prepare CMD 16*/ 473 mmio_write_32(base + SDMMC_DTIMER, UINT32_MAX); 474 475 mmio_write_32(base + SDMMC_DLENR, 0); 476 477 mmio_clrsetbits_32(base + SDMMC_DCTRLR, 478 SDMMC_DCTRLR_CLEAR_MASK, SDMMC_DCTRLR_DTDIR); 479 480 zeromem(&cmd, sizeof(struct mmc_cmd)); 481 482 cmd.cmd_idx = MMC_CMD(16); 483 if (size > MMC_BLOCK_SIZE) { 484 cmd.cmd_arg = MMC_BLOCK_SIZE; 485 } else { 486 cmd.cmd_arg = size; 487 } 488 489 cmd.resp_type = MMC_RESPONSE_R1; 490 491 ret = stm32_sdmmc2_send_cmd(&cmd); 492 if (ret != 0) { 493 ERROR("CMD16 failed\n"); 494 return ret; 495 } 496 497 /* Prepare data command */ 498 mmio_write_32(base + SDMMC_DTIMER, UINT32_MAX); 499 500 mmio_write_32(base + SDMMC_DLENR, size); 501 502 if (sdmmc2_params.use_dma) { 503 mmio_write_32(base + SDMMC_IDMACTRLR, 504 SDMMC_IDMACTRLR_IDMAEN); 505 mmio_write_32(base + SDMMC_IDMABASE0R, buf); 506 507 flush_dcache_range(buf, size); 508 } 509 510 mmio_clrsetbits_32(base + SDMMC_DCTRLR, 511 SDMMC_DCTRLR_CLEAR_MASK, 512 data_ctrl); 513 514 return 0; 515 } 516 517 static int stm32_sdmmc2_read(int lba, uintptr_t buf, size_t size) 518 { 519 uint32_t error_flags = SDMMC_STAR_RXOVERR | SDMMC_STAR_DCRCFAIL | 520 SDMMC_STAR_DTIMEOUT; 521 uint32_t flags = error_flags | SDMMC_STAR_DATAEND; 522 uint32_t status; 523 uint32_t *buffer; 524 uintptr_t base = sdmmc2_params.reg_base; 525 uintptr_t fifo_reg = base + SDMMC_FIFOR; 526 unsigned int start; 527 int ret; 528 529 /* Assert buf is 4 bytes aligned */ 530 assert((buf & GENMASK(1, 0)) == 0U); 531 532 buffer = (uint32_t *)buf; 533 534 if (sdmmc2_params.use_dma) { 535 inv_dcache_range(buf, size); 536 537 return 0; 538 } 539 540 if (size <= MMC_BLOCK_SIZE) { 541 flags |= SDMMC_STAR_DBCKEND; 542 } 543 544 start = get_timer(0); 545 546 do { 547 status = mmio_read_32(base + SDMMC_STAR); 548 549 if ((status & error_flags) != 0U) { 550 ERROR("%s: Read error (status = %x)\n", __func__, 551 status); 552 mmio_write_32(base + SDMMC_DCTRLR, 553 SDMMC_DCTRLR_FIFORST); 554 555 mmio_write_32(base + SDMMC_ICR, 556 SDMMC_STATIC_FLAGS); 557 558 ret = stm32_sdmmc2_stop_transfer(); 559 if (ret != 0) { 560 return ret; 561 } 562 563 return -EIO; 564 } 565 566 if (get_timer(start) > TIMEOUT_1_S) { 567 ERROR("%s: timeout 1s (status = %x)\n", 568 __func__, status); 569 mmio_write_32(base + SDMMC_ICR, 570 SDMMC_STATIC_FLAGS); 571 572 ret = stm32_sdmmc2_stop_transfer(); 573 if (ret != 0) { 574 return ret; 575 } 576 577 return -ETIMEDOUT; 578 } 579 580 if (size < (8U * sizeof(uint32_t))) { 581 if ((mmio_read_32(base + SDMMC_DCNTR) > 0U) && 582 ((status & SDMMC_STAR_RXFIFOE) == 0U)) { 583 *buffer = mmio_read_32(fifo_reg); 584 buffer++; 585 } 586 } else if ((status & SDMMC_STAR_RXFIFOHF) != 0U) { 587 uint32_t count; 588 589 /* Read data from SDMMC Rx FIFO */ 590 for (count = 0; count < 8U; count++) { 591 *buffer = mmio_read_32(fifo_reg); 592 buffer++; 593 } 594 } 595 } while ((status & flags) == 0U); 596 597 mmio_write_32(base + SDMMC_ICR, SDMMC_STATIC_FLAGS); 598 599 if ((status & SDMMC_STAR_DPSMACT) != 0U) { 600 WARN("%s: DPSMACT=1, send stop\n", __func__); 601 return stm32_sdmmc2_stop_transfer(); 602 } 603 604 return 0; 605 } 606 607 static int stm32_sdmmc2_write(int lba, uintptr_t buf, size_t size) 608 { 609 return 0; 610 } 611 612 static int stm32_sdmmc2_dt_get_config(void) 613 { 614 int sdmmc_node; 615 void *fdt = NULL; 616 const fdt32_t *cuint; 617 618 if (fdt_get_address(&fdt) == 0) { 619 return -FDT_ERR_NOTFOUND; 620 } 621 622 if (fdt == NULL) { 623 return -FDT_ERR_NOTFOUND; 624 } 625 626 sdmmc_node = fdt_node_offset_by_compatible(fdt, -1, DT_SDMMC2_COMPAT); 627 628 while (sdmmc_node != -FDT_ERR_NOTFOUND) { 629 cuint = fdt_getprop(fdt, sdmmc_node, "reg", NULL); 630 if (cuint == NULL) { 631 continue; 632 } 633 634 if (fdt32_to_cpu(*cuint) == sdmmc2_params.reg_base) { 635 break; 636 } 637 638 sdmmc_node = fdt_node_offset_by_compatible(fdt, sdmmc_node, 639 DT_SDMMC2_COMPAT); 640 } 641 642 if (sdmmc_node == -FDT_ERR_NOTFOUND) { 643 return -FDT_ERR_NOTFOUND; 644 } 645 646 if (fdt_check_status(sdmmc_node) == 0) { 647 return -FDT_ERR_NOTFOUND; 648 } 649 650 if (dt_set_pinctrl_config(sdmmc_node) != 0) { 651 return -FDT_ERR_BADVALUE; 652 } 653 654 cuint = fdt_getprop(fdt, sdmmc_node, "clocks", NULL); 655 if (cuint == NULL) { 656 return -FDT_ERR_NOTFOUND; 657 } 658 659 cuint++; 660 sdmmc2_params.clock_id = fdt32_to_cpu(*cuint); 661 662 cuint = fdt_getprop(fdt, sdmmc_node, "resets", NULL); 663 if (cuint == NULL) { 664 return -FDT_ERR_NOTFOUND; 665 } 666 667 cuint++; 668 sdmmc2_params.reset_id = fdt32_to_cpu(*cuint); 669 670 if ((fdt_getprop(fdt, sdmmc_node, "st,use-ckin", NULL)) != NULL) { 671 sdmmc2_params.pin_ckin = SDMMC_CLKCR_SELCLKRX_0; 672 } 673 674 if ((fdt_getprop(fdt, sdmmc_node, "st,sig-dir", NULL)) != NULL) { 675 sdmmc2_params.dirpol = SDMMC_POWER_DIRPOL; 676 } 677 678 if ((fdt_getprop(fdt, sdmmc_node, "st,neg-edge", NULL)) != NULL) { 679 sdmmc2_params.negedge = SDMMC_CLKCR_NEGEDGE; 680 } 681 682 cuint = fdt_getprop(fdt, sdmmc_node, "bus-width", NULL); 683 if (cuint != NULL) { 684 switch (fdt32_to_cpu(*cuint)) { 685 case 4: 686 sdmmc2_params.bus_width = MMC_BUS_WIDTH_4; 687 break; 688 689 case 8: 690 sdmmc2_params.bus_width = MMC_BUS_WIDTH_8; 691 break; 692 693 default: 694 break; 695 } 696 } 697 698 return 0; 699 } 700 701 unsigned long long stm32_sdmmc2_mmc_get_device_size(void) 702 { 703 return sdmmc2_params.device_info->device_size; 704 } 705 706 int stm32_sdmmc2_mmc_init(struct stm32_sdmmc2_params *params) 707 { 708 int ret; 709 710 assert((params != NULL) && 711 ((params->reg_base & MMC_BLOCK_MASK) == 0U) && 712 ((params->bus_width == MMC_BUS_WIDTH_1) || 713 (params->bus_width == MMC_BUS_WIDTH_4) || 714 (params->bus_width == MMC_BUS_WIDTH_8))); 715 716 memcpy(&sdmmc2_params, params, sizeof(struct stm32_sdmmc2_params)); 717 718 if (stm32_sdmmc2_dt_get_config() != 0) { 719 ERROR("%s: DT error\n", __func__); 720 return -ENOMEM; 721 } 722 723 ret = stm32mp1_clk_enable(sdmmc2_params.clock_id); 724 if (ret != 0) { 725 ERROR("%s: clock %d failed\n", __func__, 726 sdmmc2_params.clock_id); 727 return ret; 728 } 729 730 stm32mp1_reset_assert(sdmmc2_params.reset_id); 731 udelay(2); 732 stm32mp1_reset_deassert(sdmmc2_params.reset_id); 733 mdelay(1); 734 735 sdmmc2_params.clk_rate = stm32mp1_clk_get_rate(sdmmc2_params.clock_id); 736 737 return mmc_init(&stm32_sdmmc2_ops, sdmmc2_params.clk_rate, 738 sdmmc2_params.bus_width, sdmmc2_params.flags, 739 sdmmc2_params.device_info); 740 } 741